If you spent your entire life fighting to preserve a democratic republic only to discover your husband ushered in a violent dictatorship which oppress your future children indefinitely, losing the will to live is a natural response.
MEDICAL DROID: Medically, she is completely healthy. For reasons we can’t explain, we’re losing her.
OBI-WAN: She’s dying?
MEDICAL DROID: We don’t know why. She has lost the will to live.Although the medical droid states Padmé lost the will to live, it never states that the loss of the will to live is the only cause of her death. On the contrary, it states that Padmé is dying “for reasons we can’t explain.” Losing the the will to live was not the primary cause of Padmé’s death; it was only the subsidiary cause. The primary cause was something inexplicable and supernatural. Presumably Palpatine withdrew the Living Force from Padmé to save Anakin’s life, which is why if you listen closely Padmé’s heart stops beating the moment Anakin’s heart starts beating again.
It is very poetic: Padmé died the moment Luke and Leia were born and the moment Anakin was reborn as Darth Vader.
Don’t do drugs.